Two people were killed on Monday night in a fiery single-car crash on the southbound Interstate 15 off-ramp to St. Rose Parkway, at the south end of the Las Vegas valley, the Nevada Highway Patrol said, according to reports by FOX5 Las Vegas and News 3 Las Vegas.

Source: FOX5 Las Vegas and News 3 Las Vegas via Vegas Daily Wire

Troopers received the call at about 10:06 p.m. on Monday. Investigators said the four-door sedan left the road, struck a concrete sign and became fully engulfed in flames. Both people in the car — the driver and a passenger — were confirmed dead at the scene. Their names have not been released.

The southbound I-15 off-ramp to southbound St. Rose Parkway (State Route 146), which serves Henderson and Seven Hills, was closed overnight while investigators worked at the scene. It had reopened by 5 a.m. on Tuesday, in time for the morning commute.

The Highway Patrol has not yet said what caused the sedan to leave the road. More details are expected after the preliminary investigation. Interstate 15 is one of the busiest freight and travel corridors in the Southwest, linking Las Vegas with California to the south and Utah to the north.